68kMLA Classic Interface
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| Click here to select a new forum. | | SE/30 question ...probably basic electronics | Posted by: OleLila on 2020-04-17 12:19:51
1) Pin 8 to the logic board (+12 volts) has capacitors 2 and 25 in parallel and they seem to be intact. It also has 2 resistors (R14 and R15, with the number "100" on them but listed as 10 ohm resistors in the schematic) in parallel. When I measure either R14 or R15 I get a short. Is this really a short since they are in parallel? If I had a working logic board I'd just measure and go from there.
2) Bonus question: Does the SE/30 require the -12 volt line to be intact to boot/give chime?
Thanks to anyone.
| Posted by: OleLila on 2020-04-17 16:20:55
Alright, its basic and sorry for the space its on the Goggle (though I did figure it out by measuring a lot of the SE/30's resistors before I verified)
for other amateurs out there:
the number on the resistor is a 3 number code....first 2 numbers then the 3rd number is the number of zeros to add to the first two.
so 100 on the part is a 10 ohm resistor (10 and no zeros)
433 ia a 43000 ohm resistor (43 and 3 zeros)
102 is a 1000 ohm resistor (10 and 2 zeros)
the resistors in my question above are fine, two 10 ohm resistors in parallel that measure 5 ohms resistance
I don't know why after a couple of years on this board that my only focus has been on the capacitors.
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